单项选择题

（）is not a position-fixing system.

A.Hifix
B.Hyperfix
C.Trisponder
D.WGS84

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单项选择题

Which aid is NOT marked on a chart with a magenta circle? （）

A.Aero light
B.Radar station
C.Radar transponder beacon
D.Radiobeacon

单项选择题

When using a Lambert conformal chart in high latitudes，angles such as bearings are measured in reference to （）.

A.the meridian through the object of the bearing
B.the meridian through the ship's position
C.the meridian midway between the ship and the object
D.any meridian

单项选择题

When navigating in high latitudes and using a chart based on a Lambert conformal projection，（）.

A.a straight line drawn on the chart approximates a great circle
B.the chart should not be used outside of the standard parallels
C.the course angle is measured at the mid-longitude of the track line
D.distance cannot be measured directly from the chart

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